Restraint stress exacerbates cell degeneration induced by acute binge ethanol in the adolescent, but not in the adult or middle-aged, brain
Autor: | Macarena Soledad Fernández, Soledad de Olmos, Michael E. Nizhnikov, Ricardo Marcos Pautassi |
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Rok vydání: | 2019 |
Předmět: |
Male
Restraint Physical medicine.medical_specialty Hippocampus Alcohol Hippocampal formation Binge Drinking 03 medical and health sciences Behavioral Neuroscience chemistry.chemical_compound 0302 clinical medicine Internal medicine medicine Binge ethanol Animals Rats Wistar 030304 developmental biology 0303 health sciences Ethanol business.industry Neurotoxicity Age Factors Brain medicine.disease Rats Endocrinology chemistry Toxicity Dentate Gyrus Restraint stress business 030217 neurology & neurosurgery |
Zdroj: | Behavioural brain research. 364 |
ISSN: | 1872-7549 |
Popis: | Restraint stress (RS) induces neurotoxicity in the hippocampus, yet most of the studies have employed protracted RS (i.e., ≈ 21 days). Binge ethanol can induce brain toxicity, an effect affected by age. It could be postulated that RS may facilitate ethanol-induced neurotoxicity, perhaps to a greater extent in adolescent vs. older subjects. We analyzed whether adolescent, adult or middle-aged male rats exposed to five episodes of RS followed, 72h later, by binge ethanol (i.e., two administrations of 2.5 g/kg ethanol) exhibited hippocampal neurotoxicity. Adolescents, but not adult or middle-aged rats, exhibited sensitivity to the neurotoxic effects of ethanol at dorsal CA2, ventral CA3 and ventral DG, and a neurotoxic effect of stress at dorsal CA1. Moreover, the combination of ethanol and stress exerted a synergistic effect upon cell degeneration at ventral CA1 and CA2, which was restricted to adolescents. Ethanol also increased cell degeneration, irrespective of age or stress, in dorsal CA3 and in dorsal DG; and ethanol and stress had, across all ages, a synergistic effect upon cell degeneration at the dorsal CA1. The greater neurotoxic response of adolescents to ethanol, stress, or ethanol+stress can put them at risk for the development of alcohol problems. |
Databáze: | OpenAIRE |
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